first commit

hrmsEjb/net/sf/jasperreports/engine/fill/JRByteAverageIncrementer.java

@@ -0,0 +1,24 @@
+package net.sf.jasperreports.engine.fill;
+
+class JRByteAverageIncrementer extends JRAbstractExtendedIncrementer {
+  private static JRByteAverageIncrementer mainInstance = new JRByteAverageIncrementer();
+  
+  public static JRByteAverageIncrementer getInstance() {
+    return mainInstance;
+  }
+  
+  public Object increment(JRCalculable variable, Object expressionValue, AbstractValueProvider valueProvider) {
+    if (expressionValue == null) {
+      if (variable.isInitialized())
+        return null; 
+      return variable.getValue();
+    } 
+    Number countValue = (Number)valueProvider.getValue(variable.getHelperVariable((byte)0));
+    Number sumValue = (Number)valueProvider.getValue(variable.getHelperVariable((byte)1));
+    return new Byte((byte)(sumValue.byteValue() / countValue.byteValue()));
+  }
+  
+  public Object initialValue() {
+    return JRByteIncrementerFactory.ZERO;
+  }
+}